If I place a tin can in the sun and it gets really hot, that is an example of ( conduction / convection / radiation ).
Radiation
100
How many protons, neutrons, and electrons are in an atom of silicon - 29?
P - 14, N - 15, E - 14
100
Where are the inner transition metals located on the PT?
F block, at the bottom
100
What is a mole?
6.02 x 10^23 particles
200
NH4 breaks down into NH3 and H+ ions when heated. This is a ( physical / chemical ) property of NH4.
Chemical
200
What is an anion?
Negatively charged ion
200
What does the mass number of an atom equal?
Protons + Neutrons
200
Na and Br would be most likely to form a/an ( covalent / ionic ) compound.
Ionic
200
( True / False )
1. Ionic compounds are made of cations and anions.
2. Ionic compounds are crystalline solids at room temperature.
3. Ionic compounds are made of metals and nonmetals.
4. Ionic compounds can conduct electrical currents when melted.
All are true!
300
How many significant figures is in the number 40.00?
4
300
What does the periodic trend for electronegativity look like?
Up and right
300
Halogens form ions with a ____ charge.
-1
300
Isotopes of the same element have different numbers of ____.
Neutrons
300
Calculate the molar mass of Mg(NO2)2.
116.33 grams
400
Reactants --> Products + heat
This is the general equation for an ( endothermic / exothermic ) reaction.
Exothermic
400
Write the complete electron configuration for silicon.
1s2 2s2 2p6 3s2 3p2
400
How does atomic radius change...
across a period? (increases / decreases )
down a group? (increases / decreases )
decreases; increases
400
What is the correct formula for aluminum bromide?
AlBr3
400
What is the percent composition of H in H2O?
11.21%
500
The compound HBr is classified as (covalent / ionic / ionic with polyatomic / ionic with a transition metal / acid ). Name it.
Acid; hydrobromic acid
500
The compound Mg(ClO3)2 is classified as (covalent / ionic / ionic with polyatomic / ionic with a transition metal / acid ). Name it.